How much does it cost to fix Johnson Starley error code WATER PRESSURE SENSOR?

Typical repair cost for the Johnson Starley WATER PRESSURE SENSOR fault is £120-210 including labour.

WATER PRESSURE SENSOR High

Johnson Starley WATER PRESSURE SENSOR Fault Code

Q: What does the Johnson Starley WATER PRESSURE SENSOR fault code mean?

Your boiler has detected that the water pressure is either too low or the sensor that monitors it has stopped working.

Also written as WATERPRESSURESENSOR — same fault.

The Johnson Starley WATER PRESSURE SENSOR fault code means: your boiler has detected that the water pressure is either too low or the sensor that monitors it has stopped working.. It appears on 1 Johnson Starley model in our database.

Technical description: Water pressure sensor

Typical repair cost £120-210 (including labour)

DIY fix possible

Check the pressure gauge on the front of the boiler or under the casing.If the pressure is below 1 bar, use the external filling loop valves to top the system up to 1.5 bar.Reset the boiler to see if the fault code clears.

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Johnson Starley models that show the WATER PRESSURE SENSOR fault code

Click a model for the full fault code list and model-specific repair notes.

J32 System ET Repair: £120-210

Source

Johnson Starley WATER PRESSURE SENSOR fault code information on this page is sourced and cross-checked against the official Johnson Starley service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026